Effectiveness of ultrasound-guided percutaneous transhepatic biliary drainage to reduce radiation exposure: A single-center experience
Fig 3
An 86-year-old woman with jaundice due to common bile duct stone.
A. Venous contrast-enhanced computed tomography scan demonstrates minimal dilatation of intrahepatic bile ducts. B. Intercostal right lobe ultrasonography scan shows only portal vein (white arrow). A 21-gauge Chiba needle was inserted into the portal vein using a parallel technique (white asterisk). C. Insertion of the Chiba needle was followed by removal of the core needle, and a mixture of iodine contrast and normal saline solution was carefully injected while withdrawing the needle until bile ducts were visible on fluoroscopy. D. An 8.5 Fr drainage catheter was inserted at hilar level. Final cholangiography reveals a small stone in the distal common bile duct (black arrow).